Tsengwen Reservoir (中文版：增溫水庫) in Chiayi County, Dapu Township, is the largest lake in Taiwan. It's awesome beauty, combined with open rules regarding swimming, camping, and fishing, make it number one on my list of best places to Camp in Taiwan. There are dozens of places to camp around the lake, both by the water and in the hills over looking the lake. The water level changes from day to day, and season to season, so the parks around the lake change size as well. It's different every time I go, but never less spectacular.
Camping by the lakeside is convenient and easy.
White Horse Pavilion is well protected from the rain, and has room for a dozen tents. The road to the top is very steep though, and in poor condition.
There are also many beautiful waterfalls nearby Tsengwen Reservoir.
Chiayi County, Dapu Township
Lakeside: 23.2932, 120.57917
White Horse Pavilion: 23.29213, 120.60212
Detailed Map: https://goo.gl/y738Sx